121302232221 has 8 divisors (see below), whose sum is σ = 161738469760. Its totient is φ = 80867074752.

The previous prime is 121302232199. The next prime is 121302232237. The reversal of 121302232221 is 122232203121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121302232221 - 2²¹ = 121300135069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302239221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44316 + ... + 494538.

It is an arithmetic number, because the mean of its divisors is an integer number (20217308720).

Almost surely, 2^121302232221 is an apocalyptic number.

It is an amenable number.

121302232221 is a deficient number, since it is larger than the sum of its proper divisors (40436237539).

121302232221 is an equidigital number, since it uses as much as digits as its factorization.

121302232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540035.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 121302232221 its reverse (122232203121), we get a palindrome (243534435342).

The spelling of 121302232221 in words is "one hundred twenty-one billion, three hundred two million, two hundred thirty-two thousand, two hundred twenty-one".